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Top Forums Shell Programming and Scripting how to calculate the time 10 mins ago?? unix Post 302453082 by k00061804 on Tuesday 14th of September 2010 04:11:01 AM
Old 09-14-2010
how to calculate the time 10 mins ago?? unix

Hi guys,

Im trying to subtract time in ksh script. i.e. basically im querying a database and i want to get the time 10mins before hand..(from)

in ksh
Code:
CurrMin=$(date "+%M")
  
  from=`expr $CurrMin - 10`
  to=$CurrMin

however if i run this i say at 2 or 3 mins past the hour, i.e. 8:03 and trp and subtract 10 mins ie 07:53, the above will not work,

Is there any simple script or function to allow me to do this ?

There is alot of posts online, but i dont see any for what i am trying todo.

Any help would be appreciated

Thanks

Moderator's Comments:
Mod Comment [CODE][/CODE] tags are your friend

Last edited by pludi; 09-14-2010 at 05:22 AM..
 

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times(1)							   User Commands							  times(1)

NAME
times - shell built-in function to report time usages of the current shell SYNOPSIS
sh times ksh times DESCRIPTION
sh Print the accumulated user and system times for processes run from the shell. ksh Print the accumulated user and system times for the shell and for processes run from the shell. On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways: 1. Variable assignment lists preceding the command remain in effect when the command completes. 2. I/O redirections are processed after variable assignments. 3. Errors cause a script that contains them to abort. 4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari- able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not performed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
ksh(1), sh(1), time(1), attributes(5) SunOS 5.10 15 Apr 1994 times(1)
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